The phrase GO HARD means:To do something to the fullest without allowing yourself to abandon/surrender/quit the assignment at any point.
It is a BOLD AND BRAVE statement that someone will say to communicate that they will pour their heart, soul and mind into something and, even when it is all empty, they will find a way to pour more until the job is complete. It is a CONFIDENT/DECLARATIVE statement that one will be impenetrable, basically unyielding to pressure, to the point where no barrier you can think of (not sweat, tears, pressure, frustration, humiliation, etc) will prevent them from reaching their desired goal.
This,therefore, is a brief to design a logo that captures a bold and unique approach to pursuing ones goals, dreams, passions, and aspirations.
This statement is catching on in twitter (#gohard), extra points for thinking through how the hashtag (#) might be incorporated in the design.